Investigation of Intrachain Exciton Diffusion of MEH-PPV in Solution with Different Polarity  

不同极性溶液中MEH-PPV链内激子扩散的研究（英文）

作　　者：Xue-cong Li Qi-lin Yuan Fang Zhang Han-zhuang Zhang 李雪璁;袁启霖;张芳;张汉壮(天津工业大学应用物理系,天津300387;吉林大学物理学院,长春130012)

机构地区：[1]Department of Physics, Tianjin Polytechnic University, TianJin 300387, China [2]Femtosecond laser laboratory, College of Physics, Jilin University, Changchun 130012, China

出　　处：《Chinese Journal of Chemical Physics》2019年第2期273-276,I0003,共5页化学物理学报（英文）

基　　金：supported by the National Natural Science Foundation of China(No.61704120);Science & Technology Development Foundation of Tianjin Higher Education Institutions(No.20140904)

摘　　要：Femtosecond time-resolved transient grating technique was adopted to insight into the intra-chain exciton diffusion of MEH-PPV in solution with different polarity. Broadband white-light continuum was introduced as the probe to observe the transient absorption and the femtosecond time-resolved transient grating information simultaneously. The vibrational dephasing behaviors, single exciton relaxation, and population relaxation dynamics of MEH-PPV were systematically investigated. The result shows that the relaxation processes of the sample solution will be accelerated in the solvent with larger polarity.

关 键 词：Transient grating Exciton diffusion Poly[2-methoxy-5-(2'-ethylhexoxy)]-1 4-phenylene vinylene 

分 类 号：O631[理学—高分子化学]